By Lin Noueihed BEIRUT (Reuters) – Lebanon’s pro-Syrian prime minister is expected to step down this week after he failed to persuade opposition figures to join a government that could run the country until elections in May, associates said on Tuesday. Omar Karami resigned a month ago after coming under immense popular pressure from Lebanese angered by the killing of his predecessor Rafik al-Hariri. But he was reappointed by parliament to form a national unity government bringing together both anti-Syrian opposition members and pro-Syrian loyalists. Lebanon’s opposition, which blames Syria and the Lebanese security agencies it backs for Hariri’s death, has refused to join any government until after elections it believes will give it a majority in a chamber now largely allied to Damascus.